Posted by Help1001 on Friday, April 23, 2010 at 5:57pm.
How much heat did the water lose in going from 45 to 19.5 degrees?
Mass x specific heat water x (Tfinal-Tinitial).
How much heat did the ice gain?
mass ice x heat fusion.
heat lost + heat gain = 0.
The only unknown is mass ice.
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